I have a 'hate' for knifes, so for me I use a small one, that has done an amazing job! No one would believe how sharp and well made it is!
I do have a big knife for big jobs, but hate using it.
Have had way too many cut fingers in our house, and a few nearly lost!!!
We use ''Victorinox'' and the knife in the pic is the one I use with a round edge, it is just amazing...years later.
(yes it even cuts pumpkin) stays sharp too. :)